HALLOWEEN NOIZE: The smooth-talking duo in Chromeo teams up with the noisy electro-punks in Crystal Castles and Boysnoize to present what should be a crazy pre-Halloween dance party at the Congress Theater. And in the spirit of Halloween, tickets include some treats, like a one year subscription to TimeOut Chicago, oddly enough. 2135 N. Milwaukee Ave.; Logan Square. 7 p.m. Sold out. 17 and older.

HALLOWEEN NERD-GASM: The Chicago Nerd Social Club presents Nerd-O-Ween, a costume contest that includes four categories: best overall costume, nerdiest costume, silliest costume, and most unique costume. (How can something be “most unique” when it’s already one of a kind? Come on, nerds.) Flounders Bar And Grill, 2201 N. Clybourn Ave.; Lincoln Park. 7 p.m. $10 in advance or $12 at the door.